DM9051 SPI 接口以太网模块 + NuTinyM051 + uIP实现web server

       最近在某個论坛裡，看到这篇STM32F103+DM9051_UIP_SPI to 以太网，透过該版主拿到了DM9051NP 以太网卡，刚好手上有Nuvoton NuTiny M051 和 M451,就先用M051拿来做一个简单的web server,透过web server 来控制开发板上的LED灯亮灭。

    1. DM9051NP硬体相关描述

       DM9051NP SPI介面网卡芯片是聯傑國際(DAVICOM)为了方便MCU单片机系统进行乙太网通信而开发出的解决方案。DM9051NP晶片是带有行业标准串列外设介面（Serial Peripheral Interface，SPI）的独立乙太网控制器。DM9051NP符合IEEE 802.3 规范，它还支援以DMA 模式來传输，以实现资料传送快速。DM9051NP通过1个中断引脚和SPI介面來进行与主控制器/MCU单片机的通信，资料传输规格为10/100 M。相關介紹可以參考STM32F103+DM9051_UIP_SPI to 以太网。以下是DM9051NP 以太網卡特點：

      • Package:32支接脚封装,QFN.
      • IEEE 802.3az Energy Efficient Ethernet (EEE)
      • Built-in integrated 3.3V to 1.8V regulator
      • 远端唤醒 (WOL)
      • 平行线/交叉线自动切换 HP Auto-MDIX
      • Support 光口介面      
      • 具有16KB SRAM静态随机存取记忆
      • EMI (Class B) and HBM ESD Rating 8KV
      • 工业温度规范: –40℃ to +85℃
      • 功率：（100/10 M） => 429/561 mW
      • 连续工作温度<60℃  

        上图是聯傑國際(DAVICOM) DM9051NP 以太网路卡SPI Pin的排列。

        NuTinyM051使用的是SPI1与DM9051NP SPI脚位的硬体连接如下:

M0516DM9051P0.7(Pin32)CLK   (Pin07)P0.6(Pin33)MISO (Pin05)P0.5(Pin34)MOSI (Pin03)P0.4(Pin35)CSS   (Pin01)

       上图为M051 + DM9051硬体连接示意图。

           

     2.DM9051网卡驱动

       SPI 设定和 R/W data 参考M0516 Library SPI_Loopback sample code 可到nuvoton 官网下载M0516 Library, 再参考STM32F103+DM9051_UIP_SPI to 以太网附件中的驱动，将DM9051_Configuration() SPI设定改为M0516 SPI1 Pin Group 设定和修改DM9051_Read_Reg(), DM9051_Write_Reg(), DM9051_Read_Mem(), DM9051_Writer_Mem() , 修改如下：

(1) 首先配置M0516 SPI1 相关设定

void DM9051_Configuration(void){/* Enable SPI1 peripheral clock */CLK_EnableModuleClock(SPI1_MODULE);/* Select HCLK as the clock source of SPI1 */CLK_SetModuleClock(SPI1_MODULE, CLK_CLKSEL1_SPI1_S_HCLK, MODULE_NoMsk);/* Reset IP */SYS_ResetModule(SPI1_RST);    /* Setup SPI1 multi-function pins */SYS->P0_MFP = SYS_MFP_P04_SPISS1 | SYS_MFP_P05_MOSI_1 | SYS_MFP_P06_MISO_1 | SYS_MFP_P07_SPICLK1;/*---------------------------------------------------------------------------------------------------------*//* Init SPI                                                                                                *//*---------------------------------------------------------------------------------------------------------*//* Configure SPI1 as a master, SPI clock rate 200 KHz, clock idle low, 32-bit transaction, drive output on falling clock edge and latch input on rising edge. */SPI_Open(SPI1, SPI_MASTER, SPI_MODE_0, 8, 25000000);/* Disable the automatic hardware slave selection function. Select the SPI1_SS pin and configure as low-active. */SPI_DisableAutoSS(SPI1);SPI_EnableFIFO(SPI1, 3, 3);}

(2) 透过read cmd 读出register

/*------------------------------------------------------*//* DM9051_Read_Reg()                                    *//* SPI read command: bit7 = 0,                          *//*                   bit[6:0] = Reg. offset addr        *//* Disable auto SPI slave chip select.                  *//*------------------------------------------------------*/uint8_t DM9051_Read_Reg(uint8_t Reg_Off){    SPI_SET_SS_LOW(SPI1);  /* SPI transfer DM9051 Read-Command and Reg. offset. *///SPI_WRITE_TX0(SPI1, (uint32_t)Reg_Off); //Read command + Register offset addresswhile(SPI_GET_TX_FIFO_FULL_FLAG(SPI1));SPI_WRITE_TX0(SPI1, Reg_Off); //Read command + Register offset addresswhile(SPI_IS_BUSY(SPI1));SPI_WRITE_TX0(SPI1, 0x0); //Dummy for read register value.while(SPI_IS_BUSY(SPI1));SPI_READ_RX0(SPI1); // dummy read, jump 1st byte.SPI_SET_SS_HIGH(SPI1);return (SPI_READ_RX0(SPI1) & 0xFF);}

(3)透过write cmd 写入register

/*------------------------------------------------------*//* DM9051_Write_Reg()                                   *//* SPI write command: bit7 = 1,                         *//*                   bit[6:0] = Reg. offset addr        *//* Disable auto SPI slave chip select.                  *//*------------------------------------------------------*/void DM9051_Write_Reg(uint8_t Reg_Off, uint8_t spi_data){uint32_t cmdaddr;cmdaddr = (Reg_Off | 0x80);SPI_SET_SS_LOW(SPI1);/* SPI transfer DM9051 Read-Command and Reg. offset. */SPI_WRITE_TX0(SPI1, cmdaddr); //Read command + Register offset addresswhile(SPI_IS_BUSY(SPI1));SPI_WRITE_TX0(SPI1, (uint32_t)spi_data);while(SPI_IS_BUSY(SPI1));/*Clear SPI TX FIFO*/SPI_ClearRxFIFO(SPI1);SPI_SET_SS_HIGH(SPI1);return;}

(4) 连续读出 data 从spi array

/*------------------------------------------------------*//* DM9051_Read_Mem()                                    *//*                                                      *//* DM9051 burst read command: SPI_RD_BURST = 0x72       *//* Disable auto SPI slave chip select.                  *//*------------------------------------------------------*/void DM9051_Read_Mem(uint8_t* pu8data, uint32_t datalen){uint32_t i;// Read SPI_Data_Array back from the slaveuint8_t burstcmd = SPI_RD_BURST;SPI_SET_SS_LOW(SPI1);SPI_WRITE_TX0(SPI1, (uint32_t)burstcmd);while(SPI_IS_BUSY(SPI1));SPI_READ_RX0(SPI1);for(i = 0 ; i < datalen; i++){pu8data[i] = SPI_WRITE_TX0(SPI1, (uint32_t )0x0);while(SPI_GET_RX_FIFO_EMPTY_FLAG(SPI1));pu8data[i] = (uint8_t)SPI_READ_RX0(SPI1);}while(SPI_IS_BUSY(SPI1));/*Clear SPI TX FIFO*/SPI_ClearTxFIFO(SPI1);SPI_SET_SS_HIGH(SPI1);}

(5) 连续写入data到spi array

/*------------------------------------------------------*//* DM9051_Write_Mem()                                   *//*                                                      *//* DM9051 burst write command: SPI_WR_BURST = 0xF8      *//* Disable auto SPI slave chip select.                  *//*------------------------------------------------------*/void DM9051_Write_Mem(uint8_t* pu8data, uint32_t datalen){uint32_t i;uint8_t burstcmd = SPI_WR_BURST; /* Send the array to the slave*/SPI_SET_SS_LOW(SPI1);SPI_WRITE_TX0(SPI1, (uint32_t)burstcmd);while(SPI_IS_BUSY(SPI1));SPI_READ_RX0(SPI1);for(i = 0; i < datalen; i++){while(SPI_GET_TX_FIFO_FULL_FLAG(SPI1));SPI_WRITE_TX0(SPI1, (uint32_t)pu8data[i]);}while(SPI_IS_BUSY(SPI1));/*Clear SPI RX FIFO*/SPI_ClearRxFIFO(SPI1);SPI_SET_SS_HIGH(SPI1);}

3. 简单的web server 控制 LED

       uIP就不多介绍了，网路上有许多相关资料可以参考,在上一部份将驱动设置好后,將tapdev_init()、tapdev_read()、tapdev_send()對應到DM9051_init()、DM9051_rx()、DM9051_tx() function即可附件可參考,在main()中加入在 http_init(); 然后在http.c 在handle_input中天加 控制 LED function，新增web_led.c 和web_led.h 如下:

(1)首先先在 http.c handle_input()新增判斷:

static PT_THREAD(handle_input(struct httpd_state *s)){  PSOCK_BEGIN(&s->sin);  PSOCK_READTO(&s->sin, ISO_space);  if(strncmp(s->inputbuf, http_get, 4) != 0) {    PSOCK_CLOSE_EXIT(&s->sin);  }  PSOCK_READTO(&s->sin, ISO_space);  if(s->inputbuf[0] != ISO_slash) {    PSOCK_CLOSE_EXIT(&s->sin);  }  if(s->inputbuf[1] == ISO_space) {    //strncpy(s->filename, http_index_html, sizeof(s->filename));strncpy(s->filename, http_webMain_html, sizeof(s->filename));  } #if 1 //web control led  /* Control led, 0 = OFF, 1 = ON, 2 = Flash */  else if (s->inputbuf[3] == 'L','E','D' && ((s->inputbuf[4] == '0') ||             (s->inputbuf[4] == '1') || (s->inputbuf[4] == '2'))){    Set_LED_mode(s->inputbuf[4]);    s->inputbuf[4]= 0;    //strncpy(s->filename, "/home.html", 10);    strncpy(s->filename, http_webMain_html, sizeof(s->filename));  }#endif  else { s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;   strncpy(s->filename, &s->inputbuf[0], sizeof(s->filename));  }  /*  httpd_log_file(uip_conn->ripaddr, s->filename);*/  s->state = STATE_OUTPUT;  while(1) {    PSOCK_READTO(&s->sin, ISO_nl);    if(strncmp(s->inputbuf, http_referer, 8) == 0) {      s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0;      /* httpd_log(&s->inputbuf[9]);*/    }  }  PSOCK_END(&s->sin);}

(2)LED 设定和控制判断代码如下：

void Set_LED_mode(char lkkcode){//int i;GPIO_SetMode(P3, BIT6, GPIO_PMD_OUTPUT);if(lkkcode == ('0')) // LED off{P36 = 1;}else if (lkkcode == '1'){ // LED onP36 = 0;}else if(lkkcode == '2') // LED Flash{//for(i = 0 ; i< 30 ; ++i){P36 = 0;Delay(25);P36 = 1;Delay(25);}}}

最后在网址列输入IP 192.168.XXX.XXX进入 uip web server控制LED，因为uip  有开DHCP 也可设定为固定IP ，看使用者设定输入正确的IP位址

就可以透过web 控制LED,如下可以看到MCU +  DM9051相关讯息，最下面可以看到控制LED 选单,
按下on 、off 、Flash后网址后面会分别显示XXX.XXX.XXX.XXX / LED0、1、2让使用者可以知道目前设定

以上完成后就是一个简单webserver 控制LED应用了，最後附上程序:

DM9051网卡 + NuTinyM051 + uIP实现web server